lib/monitoring: shift an unsigned rather than an int
lib/monitoring: shift an unsigned rather than an int

Shifting an signed int value more than 31 bits is undefined behaviour,
so make the 1 an unsigned to fix this. Cleans up cppcheck static
analysis warning:

[lib/monitoring.c:909]: (error) Shifting signed 32-bit value by 31
bits is undefined behaviour

Signed-off-by: Colin Ian King <d100aa70785e45ee8deab668147d941941915c21@canonical.com>

01org/intel-cmt-cat,01org/intel-cmt-cat,01org/intel-cmt-cat